//11.从1开始，输出能被9整除的数，每20个一行，最多到10000结束
public class Task {
    public static void main(String[] args) {
        int i=1,count=0;
        while (i<=10000){
            if (i%9==0){
                count++;
                System.out.print(i+"\t");
            }i++;
            if (count%20==0){
                System.out.println();
            }
        }
    }
}